Harvest Partners announced that funds managed by the firm have completed the acquisition of Integra Testing Services from Keystone Capital. Financial terms of the transaction were not disclosed.
Integra is a national provider of commercial HVAC testing, adjusting, and balancing services, as well as controlled environment testing and certification. The company serves a range of end markets, including life sciences, healthcare, education, government, and data centers.
Integra combines testing, adjusting, and balancing services with controlled-environment testing capabilities on a single platform. The company provides turnkey services for complex facilities where testing failure and downtime can carry high costs.
Integra helps ensure complex built environments and facilities remain operational with safety, compliance, efficiency, and performance in mind. The company’s management team, led by CEO Dominic Mazzolini, will continue to lead Integra. Management will also remain significant owners of the business.
Harvest said Integra has built a national platform providing mission-critical testing, adjusting, balancing, and controlled environment services to customers operating complex facilities.
The firm said Integra is well-positioned to expand its capabilities and support customers across high-criticality end markets.
Harvest plans to support Integra’s next phase of growth organically and through strategic acquisitions that broaden the company’s service offerings and geographic reach.
Integra Testing Services is one of the country’s largest independent providers of certified testing, adjusting, and balancing and related facility testing services for commercial HVAC systems.
The company offers services including cleanroom certification, fume hood testing, pharmacy compliance testing, duct leakage testing, air barrier testing, and commissioning services.
Integra has more than 600 professionals and 30 office locations across the U.S., Mexico, and Guam. Harvest Partners is a private equity firm focused on middle-market companies. The firm has more than $20 billion in assets under management as of March 31, 2026. Keystone Capital manages more than $1 billion in capital commitments across two funds.
Support: Harris Williams and Baird served as financial advisors to Integra and Keystone Capital. DLA Piper served as legal advisor to Integra and Keystone Capital. Houlihan Lokey, Jefferies, and Solomon Partners served as financial advisors to Harvest. Kirkland & Ellis served as legal advisor to Harvest.
KEY QUOTES:
“Harvest’s growth orientation, experience, and enthusiasm for Integra will be invaluable as we continue to provide the highest quality services to our existing and new built environment customers. The Integra leadership team looks forward to a fruitful partnership with Harvest.”
Dominic Mazzolini, CEO of Integra Testing Services
“We are thrilled to partner with Dom and the entire Integra team. Integra has built a leading national platform providing mission-critical TAB and CE services to customers operating complex facilities. We believe the Company is exceptionally well-positioned to continue expanding its capabilities and supporting customers across a variety of high-criticality end-markets.”
Stephen Fessler, Partner at Harvest Partners
“Integra sits at the intersection of several investment themes that have each been long-standing focus areas for us including specialty testing, infrastructure services, and outsourced services into life sciences and healthcare. We look forward to supporting Integra’s next phase of growth, both organically and through strategic acquisitions that broaden the Company’s service offerings and geographic reach.”
Shane McHugh, Principal at Harvest Partners
